Timline and source

http://www.wisegeek.com/what-are-the-pros-and-cons-of-cloning.htm
http://www.buzzle.com/articles/pros-and-cons-of-cloning.htmlhttp://wiki.answers.com/Q/What_are_the_pros_and_cons_of_cloning
1885- August Wiesman a professor of zoology at the university of freiberg theorized that a cell would diminish as it went through differentiation.

1952- Robert Briggs and Thomas J. King cloned northern leopard frogs

1962- John B. Gurdon and V. Uhelinger grew adult frog after injectiong them with tadpole's cell

1969- Jame's Shapiero and Johnathon Beckwith announced they isolated the first gene

1979- Karl Illmensee claimed to have cloned three mice

1983- First human mother to mother embryo transfer was completed

1985- Steen Willadsen used his clonind techniqe to duplicate cows embryos

1986- Neal First, Randal Prather, and Williard Eyestone used cow embro to clone a cow.

July, 5th 1996- Dolly a sheep born near Edinburgh, Scotland was cloned by Ian Wilmut

February, 13th 2003- Dolly the first mammal to be cloned died at the age f six